Method of and means for drying paper



Fh, 10.1925 v 1,525,483

' A. H. 'WHITE METHOD OF AND MEANS FQR DRYINfi'iAPER Filed May 11, 1923 (a ssheets-sheei 1" v :Feib.10.[1925. v 1525483 v I A. gwurra METHOD d3 AND MEANS FOR DRYING PAPER File'd May 11, 1923 V sheets-shew 2 I Feb, 10, 1925. v

A. 'H. WHITE METHOD OF AND MEANS FOR DRYING PAPER I Fi led May 11, 1923 Sheets-Sheet 3 Pas es Fee 1e, 192e, r y 1,525,483 airs stares PATENT orries,

instances is. wnrrn, or OOKLYN, NEW YORK. nssrenon 'ro INTERNATIONAL I rerun COMPANY, A oonronarron or nnw *zonx METHOD onnnn means non nnrzrne PAPER.

, Application filed May 11, 1923. Serial No. 63,8321.

To all whom it may concern; air rising therefrom, and a suction fan or 35 Be it known that I, AMBROSE H. WHITE, apparatus adapted to draw d the collected acitizen of the United States, residing at air. I Brooklyn, in the county of Kings and State In the accompanying d i I of-New York, have invented certainnew and Fig. 1- is a side elevation of the drying useful Improvements 'in Methods of and portion of a paper making machine, pro- Means for Drying Paper, of which the vided with means for carrying my improved following is a specification, reference being method into effect, certain parts being'brohad therein to the a'ccompanymg drawing. ken away to better illustrate the constru iO This invention relates to the drying of tion.

2 known as dryer felts. In he drying chine consists as usual of an upper series of paper in the course of its manufacture, and .Fig, 2 is an end levation of th same on a has reference more particularly to the dryreduced scale. p v ing of the paper web in its passage through Fig. 3 is a top plan view of the same.

the .dry'ingypart of the paper making ma- Fig. 4 is a perspective view on an en\ 1e chine, which part-consists usually of a numlarged scale, looking from beneath, of one ber of hollow internally heated drying cy of. the members for collecting the moistureinders disposed in two series, one above the laden air. other, and arranged to receive the damp -Fig. 5 is a side elevation of the same, web from the wet end of the paper/nickpartly in section. 26 mg, machine, and over and-around which Fig. 6 is a cr s sectio on the line 6-6 cylinders the web travels and is subjected to f Fi r a dryingaction, the said web being pressed R f i g t0 the drawings: against the. cylinders in its travel there- A shewn more ti ul l i Fi 1 7 around, by' upper n 1 W bands PI' I the, drying part of the paper making ma- .tion of the'cylinderson the paper web, the drying cylinders 1,1, 1", etc., and a lowerv 0 heat of the cylinders expels the moisture, seri s of drying cylinders 2,95 2 etc., and various expedients hays been resorted which cylinders are internally heated and to to get rid of this exp l i t r as it are mounted for rotation'in a suitable frame ac pr ssen e n t room is very objectionable 3, with the cylinders of one series disposed for many reasons, mainly,- because of i opposite the spaces between the cylinders reabsorption by the paper, web; its collecf. th th series Th d a r web tionon the dryer felts, more particularly 4 f o th w t d f th paper king on the upper stretch of the upper f l whi h machine, passes around the cylinders of the y as is arranged over the cylinders an in two series, the web being pressed against path of the S re m f rising mo a the lower sides of the cylinders of the lower air; the intense heat created in the room; series by means of a lower endless dryer and the deposit of the moisture on the roof felt 5 suitably supported and guided as planking and, other parts pf the room. usual; and being pressed against theupper so These objectionable conditions greatly retard sides of the cylinders of the upper series by the dryin of the paper web, and they are means of an upper endless dryen felt 6 9c the aim o my invention to overcome; and whose lower stretch is guided by guide rolls Y m invention consists of an improved 7 situated between the cylinders, and Whose method of expediting and facilitating the upper stretch is guided above the cylinders 425 drying of the paper web, by subjecting the by guide rolls 8 mounted 6n the frame of ,"The invention consists also of a mechamoisture-laden air as it rises from the paper, the machine some distance above the cylinto a suction action appliedabove and a ders as clearly shown. The above \dejacent the upper sides of the upper drying scribed mechanism is one commonly emcylinders. ployed to sub ect the damp paper web to a ryingiaction, and the, cylinders being ronism for carrying said method into effect, tated, the web will travel back and forthfios said mechanism being characterized by around and between the -cylinders of the means arranged above the drying cylinders two series, said web spassing. downwardly and act to collect the moisturesladen from the inner side of one {f the two adthroughout the length of jacent cylinders of the upper series, then around the opposing cylinder of the lower series, and up around the inner side of the other adjacent cylinder of the upper series, the heat of the cylinders acting to expel the moisture from the damp web, which moisture mixing with the air rises in the form of moisture-laden air. In carrying my improved method into efr feet in connection with an apparatus of this form, I provide means above the respective cylinders of the upper series, for collecting the moisture-laden air rising from the paper in the drying action, which means in the present instance is in the form of hollow sheet metal members9, 9, 9, etc, extending lengthwise of the cylinders and concafed on their under sides so as to form in effect a series of domes open at their under sides and closed at their ends by end walls 9*. These domes are supported from the frame of the machine, in horizontal positions over the respective cylinders, by brackets 10 fixed respectively. to the framing and to the rear walls of the domes, and they extend at their front and rear ends some distance beyond the ends of the respective cylinders as clearly shown in Fig. 2, The adjacent edges of the domesrare preferably connected to each other so that they conjointly form a number of collecting domes disposed above the respective cylinders and communicating with the common space immediately over the cylinders. As a result of this arrangement and disposition of the parts, the moisture-laden air rising from the paper on thecylinders will ente and be collected by the domes at a numberEf pointscorresponding to the location of th cylinders, the tendency of the heated air to rise causing the same to accumulate in the domes rather than to escape and flow laterally beyond the same.

The moisture-laden air thus collected, is, in accordancewith my invention, continuouslydrawn off from the domes by subjecting the air in the domes to a suction or exhaust action. In the present instance this is effected by means" of pipes 11, 11, which one pipe for each dome, sides with perforations 12 for the entrance of the air from the domes. The pipes extend the domes and leave at their, forward ends and extend up wardl and connect with a trunk pipe 13 egxten ing transversely at the front of and above the series of cylinders. A pipe 14: extends rearwardly from the trunk pipe and is connected at its rear endwith the intake side of a suction or exhaust fan 15, by means of which the moisture-laden air collecting in the several domes is subjected toa suction action and is continuously drawn 01? from the domes. In this way the moisture and 'steam expelledfr'om the paper in. the drying action of the same is instantly removed fromthe machine and carried away, and is there ore prevented from being reabsorbed by the paper Web or from collecting or accumulating on any of the parts of the machine or room.

It will be observed that the air collecting domesare situated beneath the upper stretch of the upper dryer felt, and therefore the latter is effectually protected from the accumulation of moisture on the felt, which drying cylinders on the damp paper web.

In the foregoing description and accompanying drawings I have set forth my invention both in respect to the method of procedure and apparatus employed in the form which I prefer: to adopt, and whichin practise has been found .to answer to a satisfactory degree the ends to be attained. It will be manifest however, that the invention is not to be limited in respect to themethod of procedure or details of the apparatus, ex cept in so far as such' ,limitations are specified in the claims. i

Having thus described myinvention, What I claim is:

1, The method of drying making machines in which the paper passes over drying cylinders, which method consists in subjecting the moisture-laden air as it rises from the paper, to separate and distinct suction actions applied adjacent the paper in paper drying cylinders respectively, in a common space above said cylinders.

2.The method of drying paper in paper making machines in which the paper'passes over. drying cylinders, which method consists in subjecting the moisture-laden air rising form the paper, to separate and dis-1 tinct suction actions applied at points above the respective cylinders in a commonspace above said cylinders.

3. The method of dryingp-aper in paper making machines in which the paper passes over drying cylinders, which method consists in collecting the moisture-laden air from a common space above said cylinders and at separate and distinct points adjacent to and above the respective cylinders, and drawing off the collected air at such points.

4:. The method of drying paper in paper making machines in which the paper passes over drying cylinders, which method consists in collecting the moisture-laden air from a common space above said cylinders tive cylinders, and subjecting the collected air to a suction action to draw the same away.

5. In an apparatus for combination of a series of drying cylinders over which the paper to be dried passes, means over the respective cylinders for collecting at separate and distinct points the moisture-laden air rising from the paper, and means for drawing off the collected air.

6. In an apparatus for drying paper, the combination of a series of drying cylinders over which the paper to be dried passes, collecting domes over the respective cylinders to receive the moisture-laden air rising from the paper, and suction means acting to draw the air from the domes.

7. In an apparatus for drying paper, the combination of a series of drying cylinders over which the paper to be dried passes, collect-ing domes above the respective cylinders for collecting the moisture-laden air rising from the paper, a suction apparatus, and pipes connecting the suction apparatus with the respective collectin domes.

8. In an apparatus or drying paper, the combination of a series of drying cylinders over which the paper to be dried passes, collecting domes arranged above the respectiv cylinders and connected together at their adjacent edges, and means for drawing off the collected air from said domes.

9. In an apparatus for drying paper, combination of a series of drying cylinders over which the paper to be dried passes, a

drying paper, the

A series of air collecting members arranged over the respective cylinders and concaved on their under-sides, pipes extending lnto said members and formed with openings for.

the admission of th collected air, and a suction apparatus connected to the pipes for drawing off the moisture-laden air.

10. In an apparatus for drying paper, the

the

combination of a series of dryin cylinders over which the paper. to be drie passes, a series of air collectin members arranged over the respective cy 'nders and concaved on their under sides, pipes extending in said members and provided on opposite sides with openings for the admission of the collected air, and a suction apparatus connected with said pipes.

11. In an apparatus for drying paper, the combination of a series of drying cylinders over which the paper to be dried passes, a series of air collecting members arran ed over the respective cylinders, a trunk pipe extending transversely of the cylinders, a suction apparatus connected to said trunk pipe, and pipes leading from the trunk pipe and connected with the respective collecting members.

12. In an apparatus for dxg ing paper, the

combination of drying cylin ers over which the paper to be dried passes, a dryer felt for pressing the paper on the drying cylinders, dryer felt ldes for supporting the upper stretch of t e felt above the cylinders, means between said upper and the cylinders for collecting .the ture-laden air rising from the paper, means for drawing off the collected air.

13. In an apparatus for drying paper, the combination of drying cylinders over which the paper to be dried passes, and endless dryer felt whose lower stretch acts to press the paper on the cylinders, means for guiding the upper stretch of the felt above the cylinders, means arranged between the cylinders and upper stretch of the felt for collecting the moisture-laden air rising from the paper, and suction means for drawing off the collected air.

In testimony whereof, I have affixed my signature hereto.

AMBROSE H. WHITE.

moisand stretch of the felt, 

